code: def test_min_max_ordered_empty(
      self, categories, expected, aggregation
  ):
      # GH 30227
      cat = Categorical([], categories=categories, ordered=True)
  
      agg_func = getattr(cat, aggregation)
      result = agg_func()
      assert result is expected
  
imports: import re
  import sys
  import numpy
  import pytest
  from pandas.compat import PYPY
  from pandas import Categorical, CategoricalDtype, DataFrame, Index, NaT, Series, date_range
  import pandas._testing
  from pandas.api.types import is_scalar
label_desc: Use image node_id 4 for calling the TestCategoricalAnalytics obj's underlying member method code with example usage: obj.test_min_max_ordered_empty(categories, expected, aggregation) without return types